JPS6034551U - Air valve type vaporizer - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案によるエアバルブ式気化器の側面断面図
、第２図は第１図の■−■線に沿ってみた側面断面図、
第３図はエアバルブ開度と機関回転数との関係を示す線
図である。 ２・・・１次側気化器、３・・・２次側気化器、４，８
・・・吸気通路、９・・・エアバルブ、１２・・・フロ
ート室、１６・・・メインジェット、２３・・・メタリ
ンブロンド、２５・・・加速ポンプ、２７・・・燃料蓄
積室、３５・・・加速燃料供給通路、３７．３８・・・
燃料返戻通路、３９・・・負圧制御弁。Fig. 1 is a side sectional view of the air valve type vaporizer according to the present invention, Fig. 2 is a side sectional view taken along the line ■-■ in Fig. 1,
FIG. 3 is a diagram showing the relationship between air valve opening and engine speed. 2...Primary side carburetor, 3...Secondary side carburetor, 4,8
...Intake passage, 9...Air valve, 12...Float chamber, 16...Main jet, 23...Metalline blonde, 25...Acceleration pump, 27...Fuel storage chamber, 35...・Acceleration fuel supply passage, 37.38...
Fuel return passage, 39... negative pressure control valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] １次側スロットル弁の開弁動作に応動する加速ポンプの
燃料蓄積室を加速燃料供給通路を介して１次側吸気通路
内に連結して１次側スロットル弁開弁動作時に該加速燃
料供給通路から１次側吸気通路内に燃料を追加供給し、
２次側吸気通路内に吸入空気流によって開閉制御される
エアバルブを設けたエアバルブ式気化器において、該エ
アバルブ開度が予め定められた設定開度以下のときには
エアバルブ下流の２次側吸気通路内に開口しかつエアバ
ルブ開度が該設定開度以上のときにはエアバルブ上流の
２次側吸気通路に開口する負圧ポートを２次側吸気通路
内壁面に形成し、上記加速燃料供給通路を加速燃料返戻
通路を介して気化器フロート室内に連結すると共に上記
負圧ポートに負圧が作用したときに開弁する負圧制御弁
を該加速燃料返戻通路内に設けたエアバルブ式気化器。A fuel storage chamber of an acceleration pump that responds to the opening operation of the primary throttle valve is connected to the primary intake passage via an acceleration fuel supply passage, so that the acceleration fuel supply passage is connected to the primary intake passage when the primary throttle valve opens. Additional fuel is supplied into the primary intake passage from
In an air valve type carburetor that has an air valve in the secondary intake passage that is controlled to open and close by the intake air flow, when the air valve opening is less than a predetermined opening, the A negative pressure port is formed on the inner wall surface of the secondary intake passage upstream of the air valve and opens to the secondary intake passage when the air valve opening is equal to or higher than the set opening, and the acceleration fuel supply passage is connected to the acceleration fuel return passage. The air valve type carburetor is provided with a negative pressure control valve in the acceleration fuel return passage, which is connected to the float chamber of the carburetor through the negative pressure port and opens when negative pressure acts on the negative pressure port.